RF High-power technology, non-surgery, non-injection, non-narcosis, shortening hairdressing ... fiber from derma gets heat through RF energy which makes collagen get intent contract , high frequency wave permeates epidermis and take ... -ranging;Adjusting output mode- continue /pulse makes thorough treatment . Portable RF Skin Rejuvenation system, skin-tigntening,crinkles removal,tiredness alleviation